Improvement in blast-regulators for thrashing-machines



W. BOR-EN. BLAST REGULATORS FOR THRASHING-MACHINES.

No. 190,812. Patented. MaylS, 1877.

INVENTOR ".FETERS, PHOTOJJTHOGRAPHER, WASHINGTON. D C.

UNITED STATES PATENT QFFICE.

WILLIAM BOREN, OF ASHLAND, OHIO.

IMPROVEMENT IN BLAST-REGULATORS FOR THRASHlNG-MACHINES.

Specification forming part of Letters Patent No. 190,812, dated May 15,1877; application filed February 17, 1877.

To all whom it may concern Be it known that 1, WILLIAM BOREN, ofAshland, in the county of Ashland and State of Ohio, have invented a newand valuable Improvement in Wind-Regulators for Fans; and I do herebydeclare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to theannexed drawings, making a part of this specification, and to theletters and figures of reference marked thereon.

Figure 1 of the drawings is a representation ofa side view ofmywind-regulators for fans; and Fig. 2 is a central vertical sectionalview thereof. Fig. 3 is a detail view of the same.

This invention relates to fans used in thrashing-machines; and itconsists in certain devices for regulating the supply of air to thesame, substantially as hereinafter particularly set forth and claimed.

In the accompanying drawings, A designates the casing or housing of anordinary thrashing-machine, which is provided at one end with afeeding-opening, B, and a feedboard, 0. D designates athrashing-cylinder journaled within said casing or housing in front ofand below said opening B and feedboard 0.

About the middle of casing or housing A are two opposite openings, A A,in the sides of the same, through which openings air is supplied to fanE. Said fan extends across said casing or housing, and is journaled ateach end in a bearing secured to a standard, F, on the outside of saidcasing A. Said standards F F on the opposite sides of said casing aresimilar in construction and office. One of them is shown in Fig. 1, andthe other in Fig. 2. Said fan is inclosed in a cylindrical sheet-metalshell, G, which:is open at the ends to receive the air through openingsA A, and in front at g. Fig. 2, so. as to allow the expulsion of the airfor the purpose of driving off chaff and light impurities.

Vertical standards F F, respectively, bisect openings A A. One part ofeach opening is left permanently unclosed, the other being wholly orpartly closed by a swinging shutter, H. Said shutters are semicircularin form, and pivoted above to the sides of casing A. Each of them isprovided with a weight, I, as shown in Fig. 1, or with a spring, I, asshown in Fig. 3, which operates to hold its straight side against thenearer standard F. When in that position the said shutter completelycloses the half of the opening A across which it operates.

Said shutters H H are simultaneously raised, so as to let in a greateror less supply of air by means of a continuous cord, J, which isconnected by its ends to the lower parts of said shutters. Said cord ispassed through eyes jj, which are arranged above, or on a level with,said attachment, according as weights or springs are used, and themiddle part of said cord is connected to the rear end of a hook, K. Theshank of said hook works through a large staple or metal catch-loop, L,on the lower side of feeding-board O, and is provided on its under sidewith a rack or series of notches, K, which may be made to engage withsaid staple or catch-loop L and lock said hook, cord, and shutters inany desired degree of adjustment. Said hook is conveniently grasped andoperated by the man who feeds the machine. When the supply of air is tobe increased he simply pulls out the said hook to the required extent,and looks it, as stated. When the supply is to be diminished he unlocksit and allows the weights or springs to depress the said shutterssufliciently, then locks it again.

The man who feeds the machine may judge of the proper degree ofadjustment of the shutters by the rapidity of the rotary movement of thethrashing-cylinder and fan, the shutters being depressed by him when thefan revolves rapidly, and raised when the fan and thrashing-cylinderrevolve slowly, or by the sound, or by an examination of the grain afterit leaves the machine as regards the chaff mixed with it, a littlepractice readily enabling him to adjust the shutters properly.

A weight may be used with one shutter H, and a spring on the other, asshown. A different form of adjusting and locking device may besubstituted for book K, rack K, and staple or lcckin g-loo p L. Variousother changes may be made without departing from the spirit of myinvention.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a thrashing-machine, the combination I In testimony that 1 claimthe above I have of a fan with weighted or spring-pressed shuthereuntosubscribed my name in the presence ters and an operating cord extendingto the of two witnesses. feed-board, substantially as and for thepurpose set forth. WILLIAM BOREN.

2. The combination of weighted shutters H H with cord J, hook K havingrack K, and Witnesses locking staple or loop L, substantially as and J.D. JONES, for the purpose set forth. WILLIAM MANSFIELD-

